onsemi

MC33067P

MC33067P Description

The MC33067P from onsemi is a high-performance flyback DC-DC switching controller designed for robust power management applications. Housed in a 16-pin DIP (Through Hole) package, this obsolete but reliable IC operates within a supply voltage range of 8.6V to 20V, making it suitable for industrial and automotive systems requiring stable power conversion. With a switching frequency of 2.05MHz, it ensures efficient energy transfer while minimizing external component size. The MC33067P features two outputs with positive, isolation-capable transistor drivers, enabling flexible design configurations. Its flyback topology is optimized for isolated power supplies, and it includes control features like Enable and Soft Start for safe power sequencing.

MC33067P Features

• Output Type: Transistor Driver (Positive, Isolation Capable)
• Voltage Range: 8.6V–20V, ideal for mid-voltage applications
• Switching Frequency: 2.05MHz for compact filter design
• Control Features: Enable/Disable and Soft Start for reduced inrush current
• Topology: Flyback, supporting isolated power supply designs
• Package: 16-pin DIP (Through Hole) for easy prototyping and repair
• Compliance: REACH Unaffected, ECCN EAR99, suitable for global markets

Advantages: The MC33067P stands out for its high-frequency operation, reducing passive component size, and its isolation capability, which enhances safety in high-voltage applications. Unlike synchronous rectifier-based controllers, it simplifies design with its transistor driver outputs.

MC33067P Applications

• Industrial Power Supplies: Isolated converters for PLCs and motor drives
• Automotive Systems: Auxiliary power modules in 12V/24V systems
• Telecom Equipment: Flyback converters for isolated DC-DC stages
• LED Drivers: High-efficiency power stages for lighting systems
• Consumer Electronics: Offline power supplies with compact footprints

Conclusion of MC33067P

While marked obsolete, the MC33067P remains a viable choice for engineers needing a high-frequency, isolation-capable flyback controller with robust control features. Its wide input voltage range and transistor driver outputs make it adaptable to demanding environments like automotive and industrial systems. For legacy designs or repairs, this IC offers a balance of performance and simplicity, though newer alternatives may be preferred for cutting-edge projects.